package com.heima.behavior.interceptor;

import com.heima.common.dto.User;
import com.heima.common.util.UserThreadLocalUtil;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author Mr_Su
 * @version v1.0
 * @date 2022/6/28 17:59
 * @desciption
 */
public class UserInterceptor implements HandlerInterceptor {
    @Override // 进入controller方法之前会进入当前方法
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String userId = request.getHeader("userId");
        String name = request.getHeader("name");

        if (userId != null){
            User user = new User();
            user.setUserId(Integer.parseInt(userId));
            user.setName(name);
            UserThreadLocalUtil.set(user);
        }
        return true; // 直接放行
//        return false; // 拦截 ==> 不会再进入到controller的方法中了
    }

    @Override // 从controller方法出来后会先进入当前方法
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        UserThreadLocalUtil.remove();
    }
}
